Improvement in sole-nailing machines



UNITED STATES EVERETT P. RICHARDSCNrCF LAWRENCE, MASSACHUSETTS.

IMPRGVEMENT vIN SOLE-NAILING MACHINES.

Specification forming part of Letters Patent No. 152,686, dated June 30,187.4; application filed June 1, 1874.

To all 'whom t may concern:

Be it known that I, EVERETT P. RICHARD- soN, ot' Lawrence, in the countyof Essex and State of Massachusetts, have invented certain Improvementsin Sole-Nailing Machines, 85e.; and I do hereby declare that thefollowing, taken in connection with the drawings which accompany andform part of this specifica tion, is a description of my inventionsufficient to enable those skilled in the art to practice it.

The invention relates to an adjunct or combination of devices to be usedin connection with sole-nailing machines, and with other machines inwhich a slide-bar is used, to give a blow or to Work any tool aflixed tothe bar.

rlhe design of the invention is to enable a variable movement of the barto be made, the extent of movement to vary in accordance with thevarying position of the surface against which the bar or its tool is towork.

The invention will be particularly described as an adjunct to asole-nailing machine. In such a machine, or in some of such machines,the inner surface of the sole, resting upon a fixed support, causes theouter surface of the sole to vary in position vertically byvreason 0fthe unequal thickness of the sole; and the foot of the presser-bar,against which the outer surface of the sole is held,is caused tocorrespondingly vary in a vertical position when in contact with thesole. I avail myself of this varying position of the presser-barfoot toobtain a greater or less throw ot the driver, or of the awl, if an awlbe used. t

My invention consists, primarily, in making such a connection betweenthe presser-bar, or its equivalent, and the tool-carrying bar, as toautomatically change the throw of said latter bar.

Figure l shows the mechanism in front elevation. Fig. 2 is a sideelevation. Fig. 3 shows the mechanism tripped.

a denotes the frame-plate having bearings b, in which slide two verticalbars, c d, the bar c being a presser-foot bar, and the bar d adriverbar, or other tool-carrying bar. e represents the surface intowhich or against which the presser-bar rests. `The foot of said bar maybe drawn to the surface by a spring, f, and as the surface e moves undersaid foot the bar is positioned by theposition ofthe surface againstwhich it is held, or by the action of the spring. The tool-bar b isdriven toward and from the work by any suitable mechanism, and in thedrawing it is shown as jointed to a lever, g, by links h t'. The leveris pivoted to a stationary I'ulcrum, k, and to it is jointed, at Z, thelink h, the opposite end of said link being jointed to one end of theother link, t, as seen at m, the other end of said linke' being jointedto the bar. In normal position the two links are in line, one beingdirectly over the other, and both being also in line with thetool-carrying bar.

When the link h is drawn down or thrown up by movement of the lever g,or otherwise, it will be obvious that the tool-bar and links move as oneso long as they keep in line. It will also be obvious that, if the upperend of the link h be started laterally, theimotion of the link willthrow out the other link, t', and will cause the links to open insteadof' a'ecting the tool-bar.V v

Extending from the presser-bar c is an arm, n, having an incline, o, andto the link h is 4ixed a plate, p, having an incline, q, the twoinclines being' in the same vertical plane, and so arranged that theincline q strikes the other incline as the tool-bar moves down. Theposition at which the inclines collide will, of course, be determined bythe position of the presserbar, and the position of the presser-bar, asbefore observed, is varied by the position of its foot resting upon thechanging work beneath it. When the incline q strikes the incline o itthrows the link h outward, and the downward force exerted upon the linkh then operates to simply swing open the links h i, and not to forcedown the tool-bar. Consequently, the tool-bar stops at a positionpredetermined by the presser-foot bar; or, in other words, at a ixedposition with relation to the surface of the work against which the tooloperates. Thus,

. if an awl is being used, it will always penetrate to a certaindistance into the stock, however irregular the surface of such stock maybe; or a driver may drive the nails so that their heads all standuniformly with relation to such surface; or any other tool Will have itsaction governed from the irregular position of the surface of the stockagainst which it operates.

A spring, r, may be used to bring the links ing bar Whose throw isregulated froml the into line when they are thrown up, and thepresser-betr7 substantially as shown. nd denormal position of the linkz' may be regulated scribed. by a set-screw, s.

I C1aim EVERETT I. RICHARDSON. In combination with a. presser-bar whoseVitnesses: position is determined by the position of the M. W.FROTHINGHAM.

surface against which it presses, n tool-carry- C. VARREN BROWN.

